Mmm, I may not be an expert in this since I don’t have the appropriate reproductive organs, but it seems kind of insane to me that a woman could go through an entire pregnancy and child birth and not really understand that there is a small person developing in her womb. It’s beyond crazy that Dr. Nanjo or Kumasawa (the presumed midwife) wouldn’t clue her in to what is going on during the inevitable medical examinations to try to stave off another death-during-child-birth situation. I would not describe a failure to recognize Sayo as her child from Beatrice 2 as ‘making sense’ from my point of view.
I guess it could be that Kinzo had already removed Sayo from Kuwadorian before Rosa stumbled in and that whole situation happened, I would have to go back and check the timing again.